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You can put this solution on YOUR website!
U = {1, 2, 3, 4, 5, 6, 7}\r
\n" ); document.write( "\n" ); document.write( "A = {1, 2, 4, 5}\r
\n" ); document.write( "\n" ); document.write( "B = {1, 3, 5, 7}\r
\n" ); document.write( "\n" ); document.write( "How many elements are in (A' ∪ B)' ?\r
\n" ); document.write( "\n" ); document.write( "(A' ∪ B)'
\n" ); document.write( "
\r\n" );
document.write( "Substitute the sets for the letters\r\n" );
document.write( "\r\n" );
document.write( "({1, 2, 4, 5}' ∪ {1, 3, 5, 7})'\r\n" );
document.write( "\r\n" );
document.write( " {1, 2, 4, 5}' means to put all the OTHER elements of U in a set\r\n" );
document.write( " and none of these: \r\n" );
document.write( "\r\n" );
document.write( "({3, 6, 7} ∪ {1, 3, 5, 7})'\r\n" );
document.write( "\r\n" );
document.write( " The ∪ means to combine both sets into one: \r\n" );
document.write( "\r\n" );
document.write( "({1, 3, 5, 6, 7})'\r\n" );
document.write( "\r\n" );
document.write( " The ' means to put all the OTHER elements of U in a set and none of \r\n" );
document.write( " these \r\n" );
document.write( "\r\n" );
document.write( "{2, 4} contains 2 elements <--answer\r\n" );
document.write( "\r\n" );
document.write( "Edwin \n" );
document.write( "